Sophie, Duchess of Edinburgh's Most Show-Stopping Tiara Moments

Sophie wore the Anthemion tiara for a second time at the Oslo wedding of Crown Prince Haakon of Norway and his wife, Crown Princess Mette-Marit. While the Anthemion tiara's specific origins have not been confirmed, there are rumors that it was constructed out vintage jewels from the Queen's collection, namely four anthemion pieces from Queen Victoria’s Regal Circlet.

At the wedding of Princess Martha Louise of Norway and her husband, Ari Behn, Sophie once again chose the Anthemion tiara to top off her formal look.

While attending a pre-wedding gala for Crown Prince Frederik and Crown Princess Mary of Denmark's nuptials, Sophie chose this petite floral tiara. The delicate headpiece is thought to have been a loan, as the Countess has not worn it since.

For the Danish royal wedding in Copenhagen, Sophie brought out the Anthemion tiara. She paired the stunning topper with a hot pink off-the-shoulder gown and tiny crown-shaped diamond earrings.

At Prince Albert II of Monaco's Enthronement celebrations, Sophie debuted what is now called the Wessex Aquamarine Tiara. The stunning piece features a jaw-dropping central aquamarine stone. While its origins are not entirely clear, the piece was reportedly custom-made for Sophie by G. Collins & Sons, a famed English jewelry house.

The best part about the Aquamarine Tiara? It's convertible. Sophie wore it as a necklace for the ChildLine & Mission Enfance Royal gala dinner in London. She showed off the statement piece by pairing it with a simple, plunging neckline.

Sophie brought her Anthemion tiara back out for the Stockholm wedding of Sweden's Crown Princess Victoria and Daniel Westling. She paired the piece with an elaborate diamond set, featuring drop earrings and a statement necklace.

For the religious wedding ceremony of Prince Albert II and Princess Charlene of Monaco, Sophie once again chose the Anthemion tiara. At this landmark royal wedding, the Countess paired the sparkling headpiece with striped spherical earrings, a navy embellished gown, and, pinned to her dress, the Royal Family Order of Queen Elizabeth.

There's no doubt that Sophie loves aquamarine. At the wedding of Princess Madeleine of Sweden and Christopher O'Neill, the Countess showed off the Five Aquamarine tiara, lent to her by the Queen. This piece is also often called the Canadian Aquamarine Tiara, as the Queen wore the stunning topper on a state visit to Canada in 1970.

It consists of five matching aquamarine stones, surrounded by a floral diamond design. Each aquamarine is estimated to be about 10 carats, making the tiara worth roughly £1 million.

Sophie attended the wedding of Sweden's Prince Carl Philip and Sofia Hellqvist wearing her famed aquamarine tiara. The Countess paired it with an aquamarine necklace, petite diamond earrings, and the Royal Family Order of Queen Elizabeth. The look matched perfectly with her lilac, cap-sleeved gown.

For the first time in nearly a decade, Sophie wore the Anthemion tiara at a Buckingham Palace state banquet in honor of Donald Trump's visit to the United Kingdom. It looked lovely paired with a large diamond necklace and lavender off-the-shoulder gown.

For the first state banquet of King Charles's reign, Sophie once again returned to her favorite aquamarine tiara with a diamond necklace and earrings.

Sophie returned to her aquamarine look once more for a state banquet honoring the president of South Korea. She paired the piece with a white gown she previously wore to the coronation of King Charles.

At a state banquet celebrating the Emperor and Empress of Japan, Sophie wore the Lotus Flower Tiara for the first time. The tiara, created by Garrad for in 1923 for the late Queen Elizabeth the Queen Mother, was last worn by Kate Middleton.